3 definitions by CalSouth

An unfortunate genital mismatch. Either the woman's vagina is too loose or the man's penis is too small/thin, hence 'It didn't touch the sides'. Also used to disparage a woman by suggesting she has been too promiscuous.
I really liked him but when we had sex it didn't touch the sides.
by CalSouth March 11, 2015
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A polite euphemism for anal sex amongst some Star Trek fans.
Stacey wasn't too happy when I tried to give her The Vulcan Hello.
by CalSouth September 19, 2017
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Initialism describing the key elements of fellatio - Kissing, Licking, Sucking, and Swallowing. While licking and sucking are nearly always part of fellatio an inexperienced, or poorly trained, fellatrix may not understand the importance of kissing the penis as part of foreplay or that ejaculation should always happen in her mouth or throat and that she should at least attempt to swallow all of the semen.
Katie was initially reluctant to kneel for me but I took the time to teach her the importance of KLSS. Her oral skills are improving all the time. She still doesn’t enjoy swallowing but she understands that it’s required.
by CalSouth December 23, 2022
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