A way of expressing your virginity; popular in Twitch streams

The sound you make when you cough or laugh while swallowing.

Hilarious laught by a Spanish guy

Twitch emotes with the -W suffix often convey an exaggerated facial expression by the streamer or individual in question, and the KEKW emote is a recently popularized way to convey laughter or hilarity in the chat.

laugh out loud what, lolw, lelw, kekw, looks like kook

Twitch emote

A very typo definition for "okay".
Just like "kek" it is a very uwu-ed way for saying okay.