Verb - the act of "waifing"
Adjective - A cruel insult, normally used for people smaller or less fortunate than yourself.
Adverb - "in the manor of a waif"
Verb - Look man. Gimme my burlap sack back before I waif you up.
Adjective - Look at that waif person. How very waif he is.
Adverb - He walked waifly down the street.