1) Blowjob 2) Fellation 1) Fellation 2) Head 3) Oral sex 4) Oral stimulation of the penis 
Fellatio (also known as fellation, and colloquially as blowjob, BJ, giving head, or sucking off) is an oral sex act involving the use of the mouth or throat, which is performed by a person on the penis of another person or oneself (autofellatio). Oral stimulation of the scrotum may also be termed fellatio, or tea bagging. Fellatio can be sexually ...
Oral stimulation of the penis; a type of oral-genital sexual activity; contrasted with cunnilingus, which is the oral stimulation of the vulva or clitoris. ... Synonym: irrumation. ... Origin: L. ... (05 Mar 2000) ... 
(fә-la´she-o) oral stimulation or manipulation of the penis.
oral sex on a man; contact between the mouth and the penis.
Type: Term Pronunciation: fĕ-lā′shē-ō Definitions: 1. Oral stimulation of the penis; a type of oral-genital sexual activity; contrasted with cunnilingus, which is the oral stimulation of the vulva or clitoris. Synonyms: irrumation
Fellatio is the sex act of stimulating the penis with the mouth and tongue.
[n] - oral stimulation of the penis
fellation noun oral stimulation of the penis