Strange brew, kill what's inside of you.
Eliminate the harmful elements from your inner self.

She's a witch of trouble in electric blue,
Referring to a woman who causes problems and possesses some supernatural qualities.

In her own mad mind she's in love with you.
The woman is deeply infatuated with the listener, as per her distorted and delusional thought process.

With you.
Reinforcing the woman's obsessive fixation with the listener.

Now what you gonna do?
Asking what the listener intends to do in regards to the situation.

She's some kind of demon messing in the glue.
The woman and her influence are akin to a malevolent entity sticking to the listener.

If you don't watch out it'll stick to you.
Warning the listener to be cautious and avoid becoming emotionally ensnared by this woman.

To you.
Reinforcing the warning and the personal nature of the situation being described.

What kind of fool are you?
Questioning the listener's judgement and decision-making ability in regards to involving themselves with this woman.

On a boat in the middle of a raging sea,
Describing a chaotic situation where the woman would still draw attention to herself.

She would make a scene for it all to be
Emphasizing the attention-seeking nature of the woman's character.

Ignored.
Suggesting that the listener should not give into her games and manipulations.

And wouldn't you be bored?
Implying that it would be boring to indulge in the woman's antics.

Strange brew, kill what's inside of you.
Reiterating the song's message that the listener should take action to eliminate the harmful aspects of themselves.

Strange brew, strange brew, strange brew, strange brew.
Repeating the phrase 'strange brew' to further emphasize its importance and significance.