Usually, ones vocal inflection indicates that sarcasm or irony are being used.
Facial expression and other gestures may also be used.
shailly said "shut up bird brain"sarcastticaly
"Smooth move," Michael said sarcastically.
There are 5 syllables in the word sarcastically. (Sar-cas-ti-cal-ly).
A person phobic to dentist sarcastically comment to a person with clustrauphobia
An example.... The boy sarcastically commented on his sister's dress. (Sarcastically means to use sarcasm or joke about something in a rather mean way)
Ironically is an adverb commonly used to convey sarcasm in a sentence.
The teacher sarcastically said Noooooooo to the disconcentrated student when she told the class many times that it was yes.
Contrary to plan or expectation.
The meaning of the word hippopotomonstrosesquippedaliophobia is the fear of long words.
the militant was ready to fire his gun at the signal :P u like it ?
signal
Someone who acts in a cowardly and underhand manner, as an informer. It has some historical connection to the word 'snake'