Muscle in humanoids loosely defined as the part of the body located between the mid thorax and the mid thigh. Used primarily for thrusting, typically during intercourse although not always (for example it is possible to propel oneself around a room on a wheeled object by using only the thrustle, without contact with the floor by feet or hands).
P1: "Yo she so fine. Ima pick her UP"
P2: "Betterget your thrustle warmed up with some stretches"
A: While we're in the store, is there anything you want to get?
B: Not really, but I could probably use some thirstables.
A: Comestibles?
B: No, thirstables.
A trustable person is someone you can trust with information and secrets, unlike a trustworthy person who you can trust to hold your beer for a minute and not drink it.
Person 1: I can tell her anything, she's so trustworthy!
Person 2: Nah, mate she's trustable