Liverpool kiss

Etymology
From +.

Noun

 * 1)  A headbutt.
 * 2) * 1957, Gerald Kersh, Fowler′s End, 2006, The Olympia Press, |%22liverpool+kisses%22+-intitle:%22%22+-inauthor:%22%22&source=bl&ots=0D6dPlvbN-&sig=oyPjy6OYDqDFKMKhbiLQcd7tXLc&hl=en&sa=X&ei=_epKUJyGKaLOmgXJoYFY&redir_esc=y#v=onepage&q=%22liverpool%20kiss%22|%22liverpool%20kisses%22%20-intitle%3A%22%22%20-inauthor%3A%22%22&f=false page 42,
 * “This Irisher give ′im a Liverpool Kiss. You know what it is, a Liverpool Kiss? Make a quick grab for the lapels o′ the coat, an′ pull somebody forward. At the same time bunt ′im in the face miv the top o′ your ′ead an′ kick ′im in the balls miv your knee. Naturally ′e falls forward. While ′e′s falling, punch ′im in the jaw miv all your might so he gradually falls dahn senseless. Then, at your leisure, kick ′im in the ′ead. Naturally I don′t want you should do such things....″
 * 1) * 1992, Bryce Courtenay, Tandia, Volume 1, 2010, ReadHowYouWant, |%22liverpool+kisses%22+-intitle:%22%22+-inauthor:%22%22&source=bl&ots=Xy5SOxX87q&sig=3vqQVPFwUGYa5sti2gF7-h3Nhzo&hl=en&sa=X&ei=_epKUJyGKaLOmgXJoYFY&redir_esc=y#v=onepage&q=%22liverpool%20kiss%22|%22liverpool%20kisses%22%20-intitle%3A%22%22%20-inauthor%3A%22%22&f=false page 157,
 * There wasn′t room to throw a punch so, grabbing the man by the lapels of his coat, he gave him a Liverpool kiss, his forehead smashing into his assailant′s face connecting with the edge of his brow and the base of his nose.