It is an ugly and/or fat person of asian decent (male or female) which prowls at bars and clubs waiting to “prey (sexually assault)” on unsuspecting drunks with beer goggles. Is related to swamp donkey with a racial connotation.
by throwing star February 22, 2008
Get the swamp ninjamug. 
Main Entry: 1ninja(Past ninja-ed, Present ninja-ing, 3rd person present singular ninja-s)
Pronunciation: nin’ja
Function: Verb
Etymology: Sino-Japanese reading of Shinobi, meaning to steal away.
1 : To lurk in the shadows of facebook, stealthily accessing embarrassing notes and wall posts.
2 : A less creepy way of saying stalk or lurk.
The dawn of the 21st century saw the emergence of one of the creepiest inventions known to man; Social networking. So creepy, in fact, that on a top 10 list of Creepiest Things in the World, it would probably sit steadfast in number 3. Behind Japanese adult toys and giant pillows with naked anime characters on them.
Pronunciation: nin’ja
Function: Verb
Etymology: Sino-Japanese reading of Shinobi, meaning to steal away.
1 : To lurk in the shadows of facebook, stealthily accessing embarrassing notes and wall posts.
2 : A less creepy way of saying stalk or lurk.
The dawn of the 21st century saw the emergence of one of the creepiest inventions known to man; Social networking. So creepy, in fact, that on a top 10 list of Creepiest Things in the World, it would probably sit steadfast in number 3. Behind Japanese adult toys and giant pillows with naked anime characters on them.
Sam: What are you up to?
John: Oh, nothing, just ninjaing on facebook.
Sam: Damn I should have known you are the Facebook Ninja!
John: Oh, nothing, just ninjaing on facebook.
Sam: Damn I should have known you are the Facebook Ninja!
by lolonmywall.com February 5, 2010
Get the Facebook Ninjamug. Field Ninja - Typically refers to a Field worker in Nor-Cal & Cen-Cal. Due to how much clothing and head wraping gear they have on.
by CenCalNorCal October 25, 2006
Get the Field Ninjamug. Bike Ninjas are people who wear all black, and and become very ninja-looking when wearing a face mask / balaclava in cold weather. The all black also adds to their "invisibility" while riding at night (which can be dangerous). Bike Ninjas are often urban dwellers, ride fixed-gear or single-speed bikes, and are usually "hipsters" of some sort (hence the all black clothes).
by lone sentry January 9, 2012
Get the Bike Ninjamug. –noun, plural. dirt ninja or dirt ninjas.
a member of a Native American tribe or society, skilled in martial arts and stealth, who uses primitive weapons to ambush trespassers.
a member of a Native American tribe or society, skilled in martial arts and stealth, who uses primitive weapons to ambush trespassers.
by Onigato July 8, 2010
Get the Dirt Ninjamug. A ninja that is adicted to Bojangles, and considers it its DoJo. All Bojangles ninjas must go to training in Salisbury, NC.
by AriaMelody January 16, 2008
Get the Bojangles ninjamug.