| thick and threefold | | | |
| thick as thieves | | | |
| thick end | | | |
| thick of things | | | |
| thick skin | | | |
| thief in the night | | | |
| thigh-slapper | | | |
| thin air | | | |
| thin end of the wedge | | | |
| thing of the past | | | |
| think aloud | | | |
| think back | | | |
| thinking cap | | | |
| thinking man's | | | |
| think of England | | | |
| think one hung the moon | | | |
| think one is God's own cousin | | | |
| think one's shit doesn't stink | | | |
| think on one's feet | | | |
| think out loud | | | |
| think over | | | |
| think tank | | | |
| think the world of | | | |
| think twice | | | |
| think up | | | |
| think with one's little head | | | |
| thin-skinned | | | |
| thin the herd | | | |
| third hand | | | |
| third-rate | | | |
| third string | | | |
| third wheel | | | |
| thirteenth reason why | | | |
| this is where we came in | | | |
| this minute | | | |
| thorn in someone's side | | | |
| thorn in the flesh | | | |
| though but | | | |
| though I say it who should not | | | |
| thought bubble | | | |
| thousand pardons | | | |
| thrash out | | | |
| thread of thought | | | |
| thread the needle | | | |
| three-dimensional | | | |
| three-dimensionality | | | |
| three-dog night | | | |
| three guys in a garage | | | |
| three-martini lunch | | | |
| Three Musketeers | | | |
| three-on-the-tree | | | |
| three-ring circus | | | |
| three score and ten | | | |
| three sheets to the wind | | | |
| three skips of a louse | | | |
| three squares | | | |
| three-star | | | |
| Three Stooges | | | |
| thrill kill | | | |
| thrill killer | | | |
| thrill of the hunt | | | |
| through the looking-glass | | | |
| through the mill | | | |
| through the roof | | | |
| through thick and thin | | | |
| throw a bone to | | | |
| throw a fit | | | |
| throw a kiss | | | |
| throw a monkey wrench in the works | | | |
| throw a monkey wrench into the works | | | |
| throw an ant into a sty | | | |
| throw an eye | | | |
| throw aside | | | |
| throw a spanner in the works | | | |
| throw a sprat to catch a mackerel | | | |
| throw a tantrum | | | |
| throw away | | | |
| throw away the key | | | |
| throw a wet blanket on | | | |
| throw a wobbly | | | |
| throw a wrench in | | | |
| throw a wrench in the gears | | | |
| throw a wrench in the works | | | |
| throw caution to the wind | | | |
| throw cold water on | | | |
| throw down | | | |
| throw down the gauntlet | | | |
| throw dust in someone's eyes | | | |
| throw good money after bad | | | |
| throw in | | | |
| throw in at the deep end | | | |
| throw in the towel | | | |
| throw in with | | | |
| throw money away | | | |
| throw off | | | |
| throw off balance | | | |
| throw off the trail | | | |
| throw of the dice | | | |
| throw one's cap over the windmill | | | |
| throw one's hat in the ring | | | |