SIRLOIN
sirloin
(noun) the portion of the loin (especially of beef) just in front of the rump
Source: WordNet® 3.1
Etymology
Noun
sirloin (countable and uncountable, plural sirloins)
(US) A cut of beef from the lower part of the back, where the last ribs are (called rump in UK English).
(UK) A cut of beef from the middle of the back (corresponding to short loin and partly rib in US English).
Source: Wiktionary
Sir"loin`, n. Etym: [A corruption of surloin. Not so called because
this cut of beaf was once jocosely knighted (dubbed Sir Loin) by an
English king, as according to a popular story.]
Definition: A loin of beef, or a part of a loin. [Written also surloin.]
Source: Webster’s Unabridged Dictionary 1913 Edition