A shirt overbite occurs when someone is really fat and has a huge stomach. The bottom of their shirt is the same vertical length as the top of their pants but there is a huge
horizontal gap between them because their shirt is hanging from their belly. There is a
horizontal gap between the end of the shirt and the beginning of
the pants, due to their huge protruding belly.
Eli is so fat that when he tries to pick up girls they
take one look at his six inch shirt
overbite, laugh, and turn around. Eli tries to hide his shirt
overbite by wearing long shirts.