a barlow
To barlow is to get to the front of a line by blocking someone and sliding in like a sneaky thief.
Barlow: 'I blocked him. I slid in. I got to the front. I don't care if I'm a thief.'
Barlow: 'I put my hands on the bar. I slid in like a ninja. I got first.'
Barlow: 'I blocked him. I moved in. I got a drink before him. I'm a barlow.'