look up any word, like the eiffel tower:
 
1.
Not actually a word. It's the sound of a girl screaming.
You want an example? Put a fake spider in your sister's bed.
by D-san September 22, 2003
 
2.
An onomatopoeia refering to a scream. Popularised in Manga and Anime, it is often associated with fangirls who are notorious for high pitched screams that cause permanent ear canal damage to everyone within a 2 mile radius.
"OMG! It's Zac Efron! KYAA!"
by LoopholeTT July 10, 2009
 
3.
Kyaa is a giant stoner, that eats Doritos, plays GTA, and wipes his ass.
"kyaa!?! What the fuck happened to my chips!?"
"they is in my tum tum"
by king crimson April 02, 2014