a more polite shorthand for autismo.

autism-like features that present themselves in social situations as some form of social ineptitude.
somebody with tismo can be smart, stupid, or anywhere in between, but they tend to be hyper-fixated on a few topics that they really love, and have a hard time recognizing when their behavior is socially inappropriate without being explicitly told so.

usually people with tismo are capable of managing themselves in public and living a completely normal life, but there's just something a little off with them, and they sometimes will need special accommodations, like having difficulty going to the grocery store, or needing a quiet room to cool off at a party (often retreating to a car if no such room is available). in social scenarios, they will sometimes use the pretense of drug or nicotine addiction to get away from noise.
you got to meet Dave last night at the party, yeah?

yeah, he was nice, but he spent like 2 hours sitting next to the jacuzzi, talking to three drunk girls about how different models of pool pumps work while they were trying to get him to come into the jacuzzi with them. i think he's got some tismo going on.

yeah, he's quite the character, definitely a bit of tismo.
by WHATWHATWHATWHAT January 26, 2022
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One who has lost his/her mind.
Darryl, you're meant to eat the cake not wear it. You bloody tismo
by Ltchillz August 30, 2015
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A short one word abbreviation for "turns me on". An expression meant to show that something someone said, or something you see turns you on; gets you hot and horny, interests you, or that you simply agree with the latter statement.
Man A: There's no way she's our waitress, she's way too fine.
Man B: TISMO

Nerd A: Last night i raided the shit out of Derkish Hallows and got like 5 different Power Axes!
Nerd B: TISMO

Woman A: Look at that guy, i'd totally sleep with him!
Woman B: TISMO

Tourist A: Macho Picho is by far the most beautiful place i've ever been to...
Tourist B: TISMO
by KinkiKym March 14, 2012
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