satire

a drug addicted feeding the grumpy baby of his hand

a dictator promoting a McD to his citizen 

all of those above are the example of satire. satire where is defined as the used of wit especially irony, sarcasm and ridicule to criticise particular subject as depicted in literacy work, play or films.
although satire is usually meant to be funny its greater purpose is often constructive social criticism, using wit as a weapon.

there are a lot of type of satire. each nd every one of the satire were use in a different way and purpose.
for example satire of horatian.
horatioan is a playful satire in criticise some social vice through gentle mild and light hearted humour.
for juvenalian satire is more contemptuous and abrasive than the horatian . this juvenalian address social evil through scorn outrage and savage ridicule.this type of satire is less emphasis on humour. but more to irony  sarcasm moral indignation and personal invective.