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3.
A male who sits when he pees.
Nah dude, that guy is just a sinclair.
by Forest Knight October 31, 2010
 
1.
A born leader although not obvious. But due to his curious and giving nature, and his imagination, he is able to focus and listen and give of himself, something someone so young doesn't normally possesess. Wise beyond his years.
King Arthur was such a Sinclair.

Percey Jackson was modeled after a true Sinclair.
by Synda May 22, 2010
 
2.
To be Dipped in sauce, fly, stunning, iced out boss'n, can't be stopped, motivated, rockin in everything they do
Yea, he gets paid, yea da boys a sinclair mein!!
by truhstla April 10, 2006