Yes, its actually a word derived from Hindi (Indian language). Basically 'dekh' means to look and when you say 'dekho' its asking someone to take a look.
E.g.
In Hindi
Yeh ladki ko dekho- Look at this girl
In English slang
Give that girl a dekko
I am not sure whence this word originates, it sounds like something the British took home from India. It means to look at and, sort of, assess/absorb something. It is widely used in Ireland and the UK
'If you bring your new work along this evening I'll take a dekko at it'
A man who works in a low brow job as an economic migrant well having sexual interest in and older disabled man
ex. "Dave" im goner bugger you sam
ex. "sam" smash my wee ass I travelled to England for a living wage. freedom im just a wee porridge wog bugger me sexy .
freedom " other than my wee ass im Scottish dekko sam"
Someone from the USA (canada too, lets be honest!) who is an idiot in mexico.
¡Ese gringo es un cabrón! ¿Cómo se llama ese gringo? Ben....Ben Dekko