Wiktionary
wifebeater
n. 1 One who (usually as a repeated practice) beats his wife, or a husband prone to violence. 2 A kind of sleeveless shirt, often but not exclusively worn as an undershirt. 3 (context uncountable UK slang English) http://en.wikipedia.org/wiki/Stella%20Artois, a brand of lager beer.
Wikipedia
Wifebeater (wrestler)
Matt Prince is an American retired Marine and semi-retired professional wrestler, better known by his ring name Wifebeater. He is best known for his tenure in Combat Zone Wrestling from 1999 to 2004. He is known for his ring attire (a wifebeater and jeans) and a weed whacker that he brought to the ring with him, and sometimes used on his opponents.
Usage examples of "wifebeater".
Seconds later, a muscular guy in a wifebeater undershirt was staring back at me from the screen.