noun, takes する, intransitive verb

Colloquialism.
  1. cutting in line, queue jumping.

Variations

Pronunciation Kanji Kana Is Common
 
横入り よこはいり
 
横入り よこいり

Contained Kanji Breakdown

sideways, side, horizontal
よこ オウ (3rd, N3)
tree, wood
き モク こ- (1st, N5)
yellow
き オウ コウ (2nd, N2)
twenty(廿) variant
wherefore, a reason
ユウ ユ ユイ (3rd, N3)
day, sun, Japan
ひ にっ ニチ (1st, N5)
number one, line, rod radical (no. 2)
コン シ ジョ
eight, eight radical (no. 12)
ハチ や はっ (1st, N5)
enter, insert
い.る はい.る ニュウ (1st, N5)