Nervous smile / nervous laughter.

^^ = represents the eyes that are closed

; = represents the sweatdrop

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

Depicts a nervous / anxious smile in ASCII art. The semicolon serves as a sweat drop (commonly seen in anime). Very frequently seen in Instant Messages or forums.

An expression of nervous laughter, usually after saying something you perhaps shouldn't have.

A nervous smile as if indicating "Should I smile? Is it right to smile?" or asking someone it is okay to smile.

a smiley face with a mole next to the eye and one sideburn