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Labelotonomist: Person who absentmindedly removes labels from drinks bottles.
Vanessa Harding, Accenture

Lapcrop: General dirt and detrius removed from between laptop keys.
Anon

Latamess: When you spill coffee on your keyboard.
Anon

Latism: The art of being dead.
Anon

Lavacious: An eating experience for salacious over 18s.
Anon

Leftalator: Annoying person who is standing on the left hand side of the escalator on the London tube.
Adela Hussain, Accenture

Legalally Alley: Hart Street
Anon

Lightnik: A sharp jump in a company's share price.
Anon

Lingolab Lane: Oxford Street.
Anon

Lipstretch: An artificial smile e.g. the saleswoman greeted the customer with a lipstretch.
Marwan Assaf

Loafalegerie St: Great Tower Street.
Anon

Lobicious: Enlarged ears due to age.
Anon

Lontrafficonia: Phobia of London traffic jams.
Anon

Lovecra: Not believing in love.
Anon

Lubrik: Lunch break to lubricate - usually involving drink at lunch time.
Graham Welsh, Gildersons Ltd