1 definition by Tea-bagger
When a male is performming a sexual act involving a woman's breasts as a form of masturbation while straddling her (also known as titty fucking), the male throws up on her breasts while at the same time farting (with anal leakage occurring, but not necessary) on her abdomen. Ergo: Thunder (fart), Mountain (titty fuck), chowder (throwing up).
Upon a very drunken evening, my room mate perfomed a Thunder Mountain Chowder on an excessively irritating, yet equally unlucky female necessitating her taking a shower and him washing his bed linens several times.
by Tea-bagger October 27, 2004