Vocabulary

ਲੱਚਕੇ
lacchke

sways, flexes, moves seductively (from lachakna = to sway/bend)

verb
In this song
Bachke Bachke · Karan Aujla
Verse 3
ਨੀ ਮੈਂ ਅੱਖ ਨਾ ਝਪਕਾਂ ਚਾਹੇ ਲੱਕ ਤਾਂ ਲੱਚਕੇ
ni main akkh na jhapkaan chahe lakk taan lacchke
I won't even blink, even if your waist sways