ultimate shotties

To call dibs on something that over-rules all other 'shotties' or dibs used in the same sequence.

Tim: 'I shotgun front seat'
Russ: 'I ultimate shotties front seat'
Tim: 'Fuck good shotties'

Tim: 'I shotgun front seat'
Russ: 'I ultimate shotties front seat'
Tim: 'Fuck good shotties'