The act of clearing your throat is indicated by the slang onomatopoeia "hock", or "hack", and the resultant mucus as a "loogie" (lugie). This is sometimes a combination of drawing up phlegm and then expectorating or spitting, with the sound "ptui" (ptooie).
Both of these acts are simulated by the word sounds, as is the term "hacking cough".
Addendum:
There is also the resounding "splack" as the hocked/hacked loogie hits the sidewalk immediately following the "ptui."
phlegm
true
There are many ways to spell the "ooh" sound. You can spell it oh, or uh. This depends on exactly what sound it is making.
phlegm
Sound of electricity
A howling sound
well sound i out "occurs" but you spell it occurs
Delightfully, you have spelled this word correctly. I would think that these and phlegm are more or less equivalents--while static, that is. In actual use, however, it is more likely that one would fling loogies as one hacked them whilst one would merely hack up phlegm. In other words, if it isn't projectile it is not a loogie. Hope it helps.
peacock sound is called scream
I have a cough then suddenly, the phlegm was blocking my throat.
Hay-vay-noo shah-lohm ah-leh-chem "ch" is phlegm sound in throat.
A "loogie" is a thick ball of phlegm that forms in the trachea or bronchial tubes, and is coughed up. To cough up a ball of phlegm and spit it out is colloquially called " to hock a loogie" or "hawking a loogie" (from the characteristic sound of expectoration, and related to the verb "hack" meaning to cough).