tie the knot

Idioms  

1. Get married; also, perform a marriage ceremony. For example, So when are you two going to tie the knot? or They asked their friend, who is a judge, to tie the knot. [Early 1700s]

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Example Sentences

Tie the knot so that you can slide the kite string up or down until it is properly adjusted.

From The Boy Mechanic: Volume 1 700 Things for Boys to Do by Popular Mechanics Co.

Tie the knot, preacher; yer dollar is ready for ye, and we must be gittin' along home--it's 'most milkin' time,' The preacher he tied the knot, and Shalliday and the new Miz.

From The Power and the Glory by Keller, Arthur Ignatius

Tie the knot tight and put the ends in the water.

From Pan Tadeusz Or, the Last Foray in Lithuania; a Story of Life Among Polish Gentlefolk in the Years 1811 and 1812 by Noyes, George Rapall