What is "tie the knot"

vb. (context idiomatic intransitive English) To marry, wed, get married.

Tie the Knot ( foaled 1994 - Died October 2012) was an Australian-bred Thoroughbred racehorse who won 13 Group One races. In 1999-2000, he was voted Australian Champion Stayer.

Tie the Knot (, literally, "Mommy's Boyfriend") is a 2014 Taiwanese romantic-comedy television series. The television drama was produced by Sanlih E-Television (SETTV), with Cheryl Yang as the female lead and Nylon Chen and Kingone Wang as the male leads. Shooting began on May 9, 2014, and the first episode aired on May 28, 2014 on SETTV.