Top Definition
the male penis is semi-erect :)
I got a semi lob on over jennifer lopez
by Stinkey July 09, 2003

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a semi lobon can be gained by lookin at something arousing like a dead badger or your mates mum. the resultin is a half erect penis which can be used to beat gypsies or perform wang shapes with
scuba steve gained a semi-lobon then beat a girl unconcious with it
by haimes March 31, 2008

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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The stage where a males phallic organ is enlarged to halfway "there" but not finished. Handy when diving into pools with loose pants or being pantsed in public.
Jessica Alba announced she will appear topless in her next film; I for one already have a semilobon.
by TheGreenFox July 27, 2008

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt