No one of importance's definitions
an invitation to eat as much of whatever is offered as you want and take some home with you. the phrase may come from a time when inviting travelers into your home to share a meal was more common. it was considered polite to eat your fill but not to also fill your bag with food for later. the invitation to "fill your boots" would be permission from the host to do so.
host: there is more here than we can all eat now, feel free to fill your boots.
guest: thanks mister, that's generous of you.
guest: thanks mister, that's generous of you.
by no one of importance June 22, 2012
Get the fill your bootsmug. by No one of importance May 13, 2005
Get the russkimug. Is that a hot chick? "nay WAHBOO"
by No one of importance July 21, 2003
Get the wahboomug. by No one of importance July 21, 2003
Get the nay wahboomug.