A guy who thinks he's in the armed forces (namely army) but is actually a shit-munching scrote. 'Pongo Walts' also tend to be tall beyond the atmosphere, similar in look and smell to the BFG.
My mate thinks he's nails, but he's actually a Pongo Walt. That's why he's on the sex offender's register.
by josh-e-smith April 19, 2018
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