You can describe a man as a Romeo if you want to indicate that he is very much in love with someone, or that he frequently has sexual relationships with different people.
[journalism, humorous, informal]
The determined Romeo added: 'I'll find another way to show my love.'
...one of Hollywood's most notorious Romeos.
Romeo in British English
(ˈrəʊmɪəʊ)
noun
1. Word forms: plural-os
an ardent male lover
2. communications
a code word for the letter r
Word origin
from the hero of Shakespeare's Romeo and Juliet (1594)
Romeo in American English
(ˈroʊmiˌoʊ)
nounWord forms: pluralˈRomeˌos
1.
the hero of Shakespeare's tragedy Romeo and Juliet (c. 1595), son of Montague and lover of Juliet, daughter of Capulet: at the death of the lovers their feuding families become reconciled
2.
a.
a man who is an ardent lover
b.
a philanderer
3. US; [r-]
a man's house slipper with elastic in the sides
Word origin
It < Romolo < L Romulus
Examples of 'Romeo' in a sentence
Romeo
That's the Romeo I mentioned earlier, who mimicked Mr Chambers ' elbow.
Anita Anderson SOMEBODY (2002)
We shall advise Brawdy and... ah... allocate another Sierra Romeo when available.
Lunnon-Wood, Mike LET NOT THE DEEP
"'Scent-imental Romeo ', 1951. You can be bought, too, you know.