Person A: OMG!!!!!LMAO!!!1 lYkE tHaT iS sO fUnNi!!!!!!1
Person B: Okay, you're cool, cough
Jennifer: He said I was ugly! *sniff*
Ashleigh: Well, you're not, you're really quite pretty.
Usually referring to weed, but can be used in reference to virtually anything.
Robert: *cough cough*
Ronan: Oh thanks, dude. (hits it) *cough cough* Here
Matt: Cool... uh... hey, you have the lighter.
Ronon: Oh. *cough cough*
Matt: Thanks. (sparks up)