1. To come to a party late with alchohol (preferably jagermeister), get everyone drunk and then spew on a table top.
1. I'm gonna go to this party tonight and lunday it up.
by Linda Linda November 3, 2009
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A person, often male, who is unstable or deranged.
"yo, what's his problem? he acting like a lunday!"
by Marcus Rhott June 25, 2008
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1. Lad with a tin can shaped head

2. Just an absolute lad!
went ti pub las night wi janice, some tinhead lundai started on us so we thought itd be best to pack up an go some place quieter
by tinhead lundai September 21, 2010
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